#21: The app becomes unusable if user closes folder selection dialog

app/src/main/java/dev/arkbuilders/arkmemo/ui/activities/MainActivity.kt

@@ -1,5 +1,8 @@
 package dev.arkbuilders.arkmemo.ui.activities
 
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Context.CLIPBOARD_SERVICE
 import android.content.Intent
 import android.os.Bundle
 import android.view.Menu
@@ -18,10 +21,8 @@ import dev.arkbuilders.arkmemo.databinding.ActivityMainBinding
 import dev.arkbuilders.arkmemo.ui.dialogs.FilePickerDialog
 import dev.arkbuilders.arkmemo.preferences.MemoPreferences
 import dev.arkbuilders.arkmemo.ui.fragments.EditTextNotesFragment
-import dev.arkbuilders.arkmemo.ui.fragments.SettingsFragment
 import dev.arkbuilders.arkmemo.ui.fragments.NotesFragment
-import dev.arkbuilders.arkmemo.utils.replaceFragment
-import dev.arkbuilders.arkmemo.utils.resumeFragment
+import dev.arkbuilders.arkmemo.ui.fragments.SettingsFragment
 import javax.inject.Inject
 
 @AndroidEntryPoint
@@ -130,8 +131,33 @@ class MainActivity : AppCompatActivity(R.layout.activity_main) {
     fun showProgressBar(show: Boolean) {
         binding.progressBar.isVisible = show
     }
-
     companion object{
         private const val CURRENT_FRAGMENT_TAG = "current fragment tag"
     }
 }
+
+fun AppCompatActivity.replaceFragment(fragment: Fragment, tag: String) {
+    supportFragmentManager.beginTransaction().apply {
+        val backStackName = fragment.javaClass.name
+        val popBackStack = supportFragmentManager.popBackStackImmediate(backStackName, 0)
+        if (!popBackStack) {
+            replace(R.id.container, fragment, tag)
+            addToBackStack(backStackName)
+        } else {
+            show(fragment)
+        }
+        commit()
+    }
+}
+
+fun AppCompatActivity.resumeFragment(fragment: Fragment){
+    supportFragmentManager.beginTransaction().apply{
+        show(fragment)
+        commit()
+    }
+}
+
+fun Context.getTextFromClipBoard(): String?{
+    val clipboardManager = getSystemService(CLIPBOARD_SERVICE) as ClipboardManager
+    return clipboardManager.primaryClip?.getItemAt(0)?.text?.toString()
+}

app/src/main/java/dev/arkbuilders/arkmemo/ui/dialogs/FilePickerDialog.kt

@@ -1,31 +1,49 @@
 package dev.arkbuilders.arkmemo.ui.dialogs
 
 import android.Manifest
-import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
+import android.os.Bundle
 import android.os.Environment
-import android.widget.Toast
 import androidx.activity.result.ActivityResultLauncher
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.FragmentManager
+import dagger.hilt.android.AndroidEntryPoint
 import dev.arkbuilders.arkfilepicker.ArkFilePickerConfig
 import dev.arkbuilders.arkfilepicker.presentation.filepicker.ArkFilePickerFragment
 import dev.arkbuilders.arkfilepicker.presentation.filepicker.ArkFilePickerMode
 import dev.arkbuilders.arkmemo.BuildConfig
 import dev.arkbuilders.arkmemo.R
+import dev.arkbuilders.arkmemo.preferences.MemoPreferences
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class FilePickerDialog: ArkFilePickerFragment() {
+
+    @Inject lateinit var memoPreferences: MemoPreferences
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (storageNotAvailable()) { isCancelable = false }
+    }
+
+    override fun dismiss() {
+        super.dismiss()
+        if (storageNotAvailable()) { activity?.finish() }
+    }
+
+    private fun storageNotAvailable(): Boolean  = memoPreferences.getPath().isEmpty()
 
-class FilePickerDialog private constructor(){
     companion object{
 
         private const val TAG = "file_picker"
-        private var fragmentManager: FragmentManager? = null
+        private lateinit var fragmentManager: FragmentManager
         var readPermLauncher: ActivityResultLauncher<String>? = null
         var readPermLauncher_SDK_R: ActivityResultLauncher<String>? = null
 
         fun show() {
-            ArkFilePickerFragment.newInstance(getFilePickerConfig()).show(fragmentManager!!, TAG)
+            newInstance(getFilePickerConfig()).show(fragmentManager, TAG)
         }
 
         fun show(activity: AppCompatActivity, fragmentManager: FragmentManager){
@@ -36,6 +54,10 @@ class FilePickerDialog private constructor(){
             else askForReadPermissions()
         }
 
+        private fun newInstance(config: ArkFilePickerConfig) = FilePickerDialog().apply {
+            setConfig(config)
+        }
+
         private fun isReadPermissionGranted(activity: AppCompatActivity): Boolean{
             return if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
                 Environment.isExternalStorageManager()
@@ -55,10 +77,6 @@ class FilePickerDialog private constructor(){
             }
         }
 
-        fun permissionDeniedError(context: Context){
-            Toast.makeText(context, context.getString(R.string.no_file_access), Toast.LENGTH_SHORT).show()
-        }
-
         private fun getFilePickerConfig() = ArkFilePickerConfig(
             mode = ArkFilePickerMode.FOLDER,
             titleStringId = R.string.file_picker_title,